Grouping by example

 public static void main(String arg[]) {

    final AtomicInteger counter = new AtomicInteger(0);
    List<Integer> questionsList = new ArrayList<>();
    for(Integer i=0;i<100;i++) {

        questionsList.add(i*2);
    }
    final Collection<List<Integer>> dividedByTenList = questionsList.stream()
            .collect(Collectors.groupingBy(it -> counter.getAndIncrement() / 10))
            .values();
    dividedByTenList.forEach(batchlist -> {
        System.out.println("hello pawan"+batchlist);
    });
}